Question

I have custom validation in my model very similar to this one:

Multifield/range validation

and the solution offered just works:

errors.add(:base, 'Start date must be before stop date') if self.start > self.stop

Using :base causes just 1 error, and it’s fine because I don’t want two separate errors showing the same here. However, no fields are highlighted, and I need the :start and :stop fields highlighted too, as if I were using :start or :stop in errors.add.

How can I do that?

Answer 1

You should leverage Rails built in mechanisms: they consist in wrapping the form fields containing errors with a div with field_with_error class.

If this doesn’t suit you:

• customize it, see Railscast

• more manual solution, check which errors your instance bears and act accordingly, ie @instance.errors.include? :filed_name. In this scope, don’t add all your errors to base